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Trial Number 4

Trial Purpose:

To evaluate top performing products on second supplied contaminant.

Date Run:

03/25/2008

Experiment Procedure:

Three products plus the current product were all used at full strength and room temperature for removing the supplied flux.  Twelve preweighed aluminum coupons were coated with two layers of the RMA flux using a hand held swab. Once dry, coupons were weighed a second time to determine the amount of flux added. Three coupons were manually wiped using the same method as previous trials, soaking the rag and wiping the surface. Coupons were wiped briefly with a dry wipe to remove any residual cleaner. Final weights were recorded and efficiencies calculated for each coupon cleaned.

Trial Results:

All four products removed the flux from the aluminum coupons in under five minutes of manual wiping. The table lists the amount of soil added, the amount remaining after cleaning and the calculated efficiency for each coupon cleaned. The efficiencies that are over 100% can typically be due to residual soils that were on the surface prior to the initial weights or due to the solvents damaging the surface. In this case, there was no apparent visual damage to the aluminum coupons.

Cleaner Initial wt Final wt % Removed
SC Actisolv 0.0228 -0.0002 100.88
  0.0311 -0.0005 101.61
  0.0245 0.0005 97.96
Ionox HC 2 0.0234 0.0010 95.73
  0.0197 -0.0003 101.52
  0.0189 0.0008 95.77
DS 144 0.0263 -0.0004 101.52
  0.0232 -0.0002 100.86
  0.0182 -0.0002 101.1
IPA 0.0258 -0.0005 101.94
  0.0315 -0.0006 101.9
  0.0367 -0.0009 102.45

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

All three of the alternatives removed over 97% of the flux from the aluminum coupons and were closely matched to the current cleaning product.

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